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MF-USML260/12-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 12V 2.6A 1210
- Series：Multifuse®, MF-USML/X
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：12V
- Current - Hold (Ih) (Max)：2.6 A
- Current - Trip (It)：5.2 A
- Current - Max：50 A
- Time to Trip：5 s
- Resistance - Initial (Ri) (Min)：4 mOhms
- Resistance - Post Trip (R1) (Max)：30 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：-
- Qualification：-
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：1210 (3225 Metric), Concave
- Size / Dimension：0.127" L x 0.101" W (3.22mm x 2.58mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.031" (0.80mm)
- Lead Spacing：-
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Overview
The Bourns MF-USML260/12-2 is a surface-mount polymer positive temperature coefficient (PPTC) resettable fuse designed for circuit overcurrent protection. It belongs to the USML series, characterized by low ohmic resistance and compact SMD packaging. The component provides robust protection against short circuits and overloads in space-constrained layouts. It operates effectively in high-voltage and high-temperature environments, eliminating tripping caused by ambient temperature variations while offering cost-effective reliability.
Feature Summary
- Polymer PTC technology enables automatic reset after fault clearance without manual intervention
- Low ohmic resistance design minimizes power loss and heat generation during normal operation
- Compact surface-mount package facilitates automated assembly and saves board space
- High-temperature stability ensures consistent performance under thermal stress
Applications
- Automotive electronic circuit protection
- Portable consumer electronics battery packs
- Industrial control system overcurrent safeguarding
- Telecommunications equipment surge protection
Procurement Notes
Verify that the specific part number matches the required hold current and trip current specifications for your application. Confirm RoHS compliance status if restricted substances are a concern. Ensure the voltage rating aligns with the maximum circuit potential. Check datasheet for recommended reflow soldering profiles to prevent thermal damage during assembly. Validate package dimensions against PCB footprint requirements.
Selection Notes
Select this component based on the required hold current and maximum operating voltage of the protected circuit. Consider the physical size constraints of the PCB layout when choosing between different series options. Evaluate the thermal environment to ensure the device can handle expected ambient temperatures without nuisance tripping. Compare response times and residual voltage characteristics against other protection devices for optimal system performance.
Part Context
This component is part of Bourns' Multifuse PPTC family, specifically the USML series optimized for low impedance applications. It complements other circuit protection solutions like gas discharge tubes and transient voltage suppressors within Bourns' portfolio. The USML series targets markets requiring reliable, space-efficient overcurrent protection with minimal impact on signal integrity or power efficiency.
Replacement Considerations
Direct substitutes include other MF-USML series variants with similar electrical ratings. Cross-reference hold current and trip current values when considering alternative manufacturers' PPTC devices. Verify package compatibility and thermal characteristics before substituting. Consult official replacement guides for confirmed equivalent part numbers.
